[out:xml][timeout:3600]; ( relation(9217839)['wikidata'='Q2521677']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikipedia and wikidata tag to a travel']
[out:xml][timeout:3600]; ( relation(14931638)['wikidata'='Q62530876']['wikipedia'='de:Naturwaldreservat Waldkugel']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
JOSM Wikipedia plugin
Note to self: online version hosted at https://matkoniecz.github.io/OSM-wikipedia-tag-validator-reports, files are stored at https://github.com/matkoniecz/OSM-wikipedia-tag-validator-reports.